Water temperature control device

Abstract

A water temperature control device wherein the relative inflows of hot and cold water into a mixing chamber and then to an outlet are controlled by a mercury filled temperature sensing element, the volume expansion or contraction of the mercury activating a slave cylinder and connecting linkage to open and close in compensatory fashion the valves allowing increased and decreased water flows from the cold and hot water supplies.

What is claimed is: 
     
       1. A water temperature contorl device comprising: a cold water inlet communicating sequentially with a check valve, a ball valve, and a mixing chamber;   a hot water inlet communicating sequentially with another check valve, another ball valve, and the said mixing chamber;   a tubing extending through, but not communicating with, the interior of said chamber; said tubing communicating with a temperature control cylinder housing a piston and a threaded piston rod adjustable with a vernier dial;   said tubing also communicating with a slave cylinder housing another piston and another piston rod which is connected by a linkage means to the said ball valves such that when the slave cylinder piston rod is extended, the said linkage means opens the hot water ball valve and closes the cold water ball valve; and when the slave cylinder piston rod is compressed, the said linkage means closes the hot water ball valve and opens the cold water ball valve;   a temperature-volume sensitive liquid within the said tubing, temperature control cylinder, and slave cylinder, such that a temperature increase within the said mixing chamber will increase the temperature of the said liquid-filled tubing extending through said chamber, leading to an increased volume of said liquid, thereupon compressing the slave cylinder piston;   wherein the said linkage means is comprised of: an armature with a threaded cavity into which is screwed the end of the said slave cylinder piston rod, such rod being threaded at its extended end;   the said armature being positionally adjustable along and pivotally connected by a shoulder bolt and shoulder nut to the long section of an L-shaped plate, said L-shaped plate being firmly connected at its vertex to the rotatable axle of the said hot water ball valve;   the short section of the said L-shaped plate being adjustably and pivotally connected by a shoulder bolt and a shoulder nut to another armature with a threaded cavity, which in turn is connected by a threaded rod to a third armature with a threaded cavity, the said third armature being adjustably and pivotally connected to a linear plate, said linear plate being firmly attached at one end to a rotatable axle of the said cold water ball valve.